Punch



July 13, 1937- l.. G. FREEMAN, .1R

PUNCH Filed April 27, 195eV Patented July 13, 1937 UNITED STATES PATENT OFFICE,

Louis G. Freeman, Jr., Cincinnati; Ohio, assignor to The Louis G. Freeman Company, Cincinnati,

Ohio, a corporation of Ohio i l Application Apri-1h27, 1936, Serial No. 76,656

, 17 Claims.. i (CL 164;-132Ux v This invention relatesV to? punches, and. more proponi-as `z-zontrasted, with the shank, access particularly to-improvem-entsfin handf punches df is readily obtained to` the rear endof the tube a type utilizing perforating tubes' of various sizes proper, thus facilitating removal of the tube and styles, for use. principally; in punching'out from the head. 1v

5.. paper patterns, thema-king up of new designs To the attainment of. the above and other ob- 5:.

i-n patternsv of variousrki'nds, in the: formation of jects, which-"will appear as` the description prodesigns in shoe; uppers, andv forfotherpurposes. ceeds, referencemay be made to the accompany- The main objection to punches ci this nature, ing. drawing, in whichzzas vknownv in the:` artgis thztendency'of the` chips Y Fig, 1 represents a verticalielevation of the imlc or? cuttingsytof clog;resulting.- in a necessary rel proved punch completely assembled; 101 placement oifthe perforating tube used in the v Fig. 2 isa verticalv section thereof on the line punch.; Qrdinarily it is: quites diiicult: to re`- 2-2 of 1;- f move; the perforating tube and insert ai new one, Fig. 3-V is aplan oi the: tube end of the punch;` and in some instances-"the clogging ofthev chips Fig. 4 is a section on the line 44.of.Fig..2;

l5 will cause 'the tube tof'break';- this does' not Fig. 5 is a view similar to, Fig.,2, but slightly I5'v occur the tube isf liable to damage in` removal enlarged andillustrating afmultiple. tube punch;` and replacement. Further,;if: the tubeis clogged, and I a satisfactory perforation of thework willy not Fig. 6 is a. viewillustrating.conventional. pracbe obtained.. "I tice, presented. for comparative purposes with Punches of thisftype as heretofore used, gen- Fig. 2.v l 29 erally 4comprise a solid` shank, formed with a. Referring more particularly to thedrawing in socket at one endY torec'eive' a relatively-small", which like. reference` numerals designate like hollow perforating: tube of the desired conguraparts,` andwith partioulaireferencc to Fig. 6 tion, the 'shank being recessed, vor cutaway at which. illustrates` the type of` structure known the base of the socket, such thatin normal"op toA theprior art, it'will beseenthat conventional 25 eration the' cuttingsor chips pass through punchesfcomprise ashank 6 having a hollow the tubge and out.l the basesoffthe' socket. at'the socket portion..,1f, terminating` in a. cut away or cutaway portion'. V I u v recessed portion s, anda performing tube 9 Thepresent invention contempiates as a lprifrictonallysecured in; the portion 'I. Of course,

mary object, the' provision oa structure, which the interior of. the socket portion 1 will. be suit- 3B WilLminimizec-loggingf in lthe rst instance, 'and ably shouldered toA resist inward movement of in-which thetube is readilyA and: quicklylreplacethe `tubeil, the shoulder being` of such a dimenable when desirable or necessary. sion4 as to permit engagement with the tube of '-Afnotherobject. isf-tosd form the: shank as any suitable tool for knocking out the tube 35 to'.v strengthen the punch, at points which would when. necessary'. In use the chips or cuttings 35 otherwisel be 'susceptible toi breakage; pass through the tube 9 and out through the re- In; accordance: with; therV invention,: the shank cessed portion 8. l I of the punchV is made hollow or'- tubular to:`re-` The improved punch of the present inventlon ceive the cuttings; with 'ani internaldiameter comprises a shank I0 having. a hollow interior 40 greater than thatof the tube, thus minimizing II, which extends from end to end of the shank, 40,

chances off clogging and avoiding danger `of. the shank being` provided with a flattened porbreakageby cutting away any portion of' the tion I2. by means of which the punch may be l sha-nk.; Thev socket portion of: the`- shank which held against rotary movement. This portion receives and supports` the perforating tube is also forms a convenient place for markingl the 4'5 formed as; a detachable head, removable from punch with any suitable indicia. 45

theV shank proper, thereby'"permittingl quick re- The hollow interior I I of the shank I0 is enplacement of the tube. Thetube. which heretolarged` and threaded at one end as indicated' at l fore has' been wedged, driven or sweated into I3 to receive a collet or removable head, providthe socket of the shank may be similarly securedY ing asocket portion I4. The threading at I3 tothe removablefsocket portion. or'head.. andw the begins slightly below the end of the shank, to 50 headcan be screwthreaded into'the shank. Reforni a shoulder for the head, thus permitting a movale ofthe entirerhead with" its tube from the tight joint, without binding. shank may beeiected with very` little effort and This head is formed with a stem I5 externally an entireinew unit` substituted therefonor, bethreaded-toit the endv portion I3. A perforating `cause ofthexreduced length oi the socketportion tube ,Iiiooif any desi-red configuration, illustrated g5 in the present embodiment as of diamond shape, is secured in the head or socket portion I4.

It will be observed that the normal4 internal diameter of the shank, while slightly smaller than that of the threaded portion I3, is nevertheless greater than the greatest internal diameter of the tube I6.

The head I4 is perforated as at I1 to a diameter substantially coincident with the hollow interior of the tube I 6, (actually it is slightly larger in order to permit removal of the tube I6 by any suitable knock out tool, as in the case of the form illustrated in Fig. 6) in order to provide shoulders for the tube I 6, such perforation I1 merging into an interior I8 of a larger diameter, coincident with the interior II of the shank I0. This arrangement, by producing an opening for the reception of the chips which is greater than the chips themselves, facilitates immediate removal of the cuttings or chips, functioning in the same manner as the recess 8 referred to in connection with Fig. 6, without, however, weakening any portion of the punch.

In Fig. 5 a modification is illustrated, in which a plurality of tubes may be utilized, as distinguished from the single tube I6. In this form the tubes |60 are inserted in suitably formed sockets, which merge into interior perforations |10 corresponding to perforations I 1. The plurality of perforations I'I0 merge into the hollow interior of the stem |50, and the entire head or socket portion |40 is screw threaded into a shank |00, all as described in connection with the single tube form.

Having thus described the invention the advantages thereof will be readily apparent. When quick replacement of a tube is required the unit consisting of the head I4 and tube I6 can be readily removed, the head being provided with flattened sides for the reception of a vise or a wrench. Inasmuch as the length of the head I4 is considerably less than that of the entire shank, ready access is afforded to the tube for removal thereof from the head. If any breakage should occur the entire punch is'not rendered useless as would be the case in the event of breakage of the head or socket portion 1 from the shank 6 illustrated in Fig. 6.

The hollow shank avoids need for weakening any part of the punch, as by cutting a recess such as the portion 8 of Fig. 6.

Having thus described my invention, what I claim as new and desire to secureby Letters Patent of the United States is:-

1. In a punch of the class described, a tubular shank, a tubular head detachably mounted thereon vand communicating with the interior thereof and terminating in a perforating tube.

-2. In a punch of the class described, a tubular shank, a tubular head including a perforating tube socket, detachably mounted thereon and communicating with the interior thereof, and a hollow perforating tube mounted in said socket.

3. In a punch of the class described, a tubular shank, a tubular head detachably mounted thereon and communicating with the interior thereof and terminating in a hollow perforating member, and means in said shank to receive and guide cuttings from said perforating member.

4. In a punch of the class described, a tubular shank, a tubular head including a perforating tube socket, detachably mounted thereon and communicating with the interior thereof, a hollow perforating tube mounted'in said socket, and

means in said shank to receive and guide cuttings from said perforating tube.

5. In a punch of Athe class described, a tubular shank, a tubular socket portion detachably mounted thereon and communicating with the interior thereof and a perforating tube in said socket portion, the internal diameter of said tubular shank being greater than ,the internal diameter of said perforating tube.

6. In a punch of the class described, a tubular shank, a tubular socket portion detachably mounted thereon and communicating with the interior thereof and a perforating tube in said socket portion, the internal diameter of said tubular shank being greater than the internal diameter of said perforating tube, and the internal diameter of said socket portion being approximately coincident at one end with that of the tube, and enlarged at the other end to coincide with the internal diameter of the shank.

7. In a punch ofthe class described, a tubular shank, a socket portion detachably mounted thereon and communicating with the interior thereof and a perforating member in said socket portion, said socket portion and shank being threaded for attachment to each other, and said perforating member being separable from said socket portion.

8. In a punch of the class described, a tubular shank, a tubular socket portionl detachably mounted thereon'and communicating with the interior thereof and a perforating tube in said socket portion, the internal diameter of said tubular shank being greater than the internal diameter of said perforating tube and the greatest dimension of cuttings entering said perforating tube, whereby said cuttings will readily free themselves from the tube.

9. In a punch of the class described, a tubular shank, a socket portion detachably mounted thereon and communicating with the interior thereof and a perforating member in said socket portion, said shank being provided with a. flattened portion for the reception of indicia.

10. In a non-clogging hand punch comprising a tubular shank, a hollow head member and a removable perforating tube carried by said head member said head member communicating with the interior of said shank, the hollow interior of said shank and a portion of said head being of greater diameter than the internal diameter of the remainder of said head and of said tube.

11. In a non-clogging hand punch comprising a tubular shank, a hollow head member and a perforating tube carried by said head member said head member communicating with the interior of said shank, the hollow interior of said shank and a portion of said head being of greater diameter than the internal diameter of the remainder of said head and of said tube, and readily detachable means connecting said head and tube as a unit to said shank, whereby said tube may be readily replaced.

12. In a punch of the class described, a tubular shank, a head detachably mounted thereon and communicating with the interior thereof and terminating in a plurality of perforating members.

173. In a punch of the class described, a tubular shank, a head, including a plurality of tube sockets, detachably mounted thereon and communicating with the interior thereof, and a perforating tube mounted in each of said sockets.

14. In a punch of the class described, a tubular shank, a head detachably mounted thereon and communicating with the interior thereof, and terminating in a plurality of perforating members, and means common to all of said perforating members to receive and guide cuttings into said shank.

15. In a punch of the class described, a tubular shank, a head including a plurality of tube sockets, detachably mounted thereon and communicating with the interior thereof, a perforating tube mounted in each of said sockets, and" means common to all of said tubes'and sockets to receive and guide cuttings'into said shank.

16. In a punch of the class described; a shank, a hollow head detachably mounted thereon and terminating in a perforating tube, said shank having a hollow, chip receiving portion in communication with said head.

17. In a punch of the class described, a shank, a hollow head detachably mounted thereon and terminating in a perforating tube, said shank having a hollow, chip receiving portion in communication with said head, the internal diameter of said hollow, chip receiving portion being greater than the internal diameter of said tube. LOUIS G. FREEMAN, JR. 

